John Phillip Law
Diabolik
Marisa Mell
Eva Kant
Michel Piccoli
Inspector Ginko
Adolfo Celi
Ralph Valmont
Claudio Gora
Police Chief
Mario Donen
Sgt. Danek
Renzo Palmer
Mr. Hammond
Caterina Boratto
Lady Clark
Lucia Modugno
Prostitute
Annie Gorassini
Rose
Carlo Croccolo
Lorry Driver
Lidia Biondi
Policewoman
Andrea Bosic
Bank Manager
Federico Boido
Joe
Tiberio Mitri
Valmont's Henchman #1
Isarco Ravaioli
Valmont's Henchman #2
Giorgio Sciolette
Dr. Ferrar
Terry-Thomas
Minister of Interior / Minister of Finance
Giulio Donnini
Dr. Vernier (uncredited)
Edward Febo Kelleng
Sir Harold Clark (uncredited)
Sandro Dori
Stud (uncredited)
Giorgio Gennari
Rudy (uncredited)
Giuseppe Fazio
Tony (uncredited)
Massimo Ciprari
Fake Diplomat (uncredited)
Franco Bellucci
Fake Diplomat (uncredited)
Orlando Pallamari
Mr. Hammond's Secretary (uncredited)
Francesco Mulè
(uncredited)
Angela Palmieri
Dr. Vernier's Nurse (uncredited)
Milena Zampana
Party Guest (uncredited)
Raniero Dorascenzi
Party Guest (uncredited)
Vezio Natili
Party Guest (uncredited)
Lella Cattaneo
Party Guest (uncredited)
Renzo Granelli
Party Guest (uncredited)
Mario Ingrassia
Party Guest (uncredited)
Filippo Perego
Party Guest (uncredited)
Augusto Innocenzi
Party Guest (uncredited)
Domenico Ravenna
Party Guest (uncredited)
Silvio Klein
Journalist at Press Conference (uncredited)
Oscar Sciamanna
Journalist (uncredited)
Regina Elena Bisio
Old Woman at the Morgue (uncredited)
Mario Bava
Director
Mario Bava
Screenplay
Brian Degas
Screenplay
Tudor Gates
Screenplay
Dino De Laurentiis
Producer
Ennio Morricone
Original Music Composer
Antonio Rinaldi
Director of Photography
Romana Fortini
Editor
Flavio Mogherini
Art Direction
Piero Gherardi
Costume Design
Luciana Marinucci
Costume Design
Angela Giussani
Story
Luciana Giussani
Story
Adriano Baracco
Story
Giorgio Adriani
Production Assistant
Marco Tamburella
Production Assistant
Fred Sidewater
Production Accountant
Mario Celentano
Sound Recordist
Lamberto Bava
Assistant Director
Guidarino Guidi
Casting Director
Nicola Balini
Technical Advisor
Rosalba Scavia
Script
Alfonso Avincola
Still Photographer
Ennio Michettoni
Set Dresser
Otello Fava
Makeup Artist
Renata Magnanti
Hairdresser
Bruno Todini
Production Manager
Mario Bava
Director of Photography
Dino Maiuri
Story
Dino Maiuri
Screenplay
Elena Da Forno
Assistant Art Director
Dino Leonetti
Assistant Art Director
Mavio Celentano
Sound Recordist
Gaetano Testa
Boom Operator
Salvatore Caruso
Assistant Camera
Cristo Verrillo
Electrician
Nadia Bonifazi
Assistant Editor